The word(s) "forbidden" appears 37 time(s) in 35 verse(s) in Quran in Muhammad Habib Shakir translation.

(31) On the day when they shall see the angels, there shall be no joy on that day for the guilty, and they shall say: It is a forbidden thing totally prohibited.

(32) And they who do not call upon another god with Allah and do not slay the soul, which Allah has forbidden except in the requirements of justice, and (who) do not commit fornication and he who does this shall find a requital of sin;

(33) Say: I am forbidden to serve those whom you call upon besides Allah when clear arguments have come to me from my Lord, and I am commanded that I should submit to the Lord of the worlds.

(34) Neither intercepted nor forbidden,

(35) Have you not seen those who are forbidden secret counsels, then they return to what they are forbidden, and they hold secret counsels for sin and revolt and disobedience to the Apostle, and when they come to you they greet you with a greeting with which Allah does not greet you, and they say in themselves: Why does not Allah punish us for what we say? Hell is enough for them; they shall enter it, and evil is the resort.